Synthesis of host‐guest hematite photoelectrodes for solar water splitting

• Type: Article in International Scientific Journal
• Date: 2019-04-29

Authors

Filipe Francisco (Author) FEUP; Paula Dias (Author) FEUP; Dzmitry Ivanou (Author) FEUP; Fátima Santos (Author) Other; João Azevedo (Author) FEUP; Adélio Mendes (Author) FEUP

Journal

Title: ChemNanoMat

Vol. 5 No. 7

Pages: 911-920

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 1 Citation

ISI Web of Science

Scopus - 3 Citations

Associated Projects

SunStorage - Recolha e armazenamento de energia solar

LEPABE - Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia

LEPABE-2-ECO-INNOVATION - LEPABE-2-ECO-INNOVATION

SunFlow - Armazenamento de energia solar em baterias redox de caudal

HopeH2 - Dispositivo tandem PEC-PV eficiente, estável e escalável para geração de hidrogénio solar

Other information

Authenticus ID: P-00Q-PRN

DOI: 10.1002/cnma.201900141

Abstract (EN): Hematite (α-Fe2O3) is a promising semiconductor for photoelectrochemical (PEC) water splitting, due to its abundance, low-cost and excellent stability. However, the efficiency of α-Fe2O3 photoelectrodes has been limited by its low hole mobility and fast electron-hole recombination. Host-guest architectures have emerged as a suitable design, which involves the use of a nanostructured collector for high solar absorption while maintaining an ultrathin absorber layer for better charge transport. In this study, a thin mesoporous SiO2 host template coated with a conductive thin layer of TiO2 was optimized to support the α-Fe2O3 film. The α-Fe2O3 thin layer was deposited by spray pyrolysis and then coated with a FeNiOOH co-catalyst. A photocurrent improvement of ca. 85% over planar α-Fe2O3 thin film reference was registered demonstrating the potential of this host-guest approach. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11